Amstrad CPC Expansion Port
From HwB
Pinout
49 47 45 43 41 39 37 35 33 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 1 ============================================= ============================== 50 48 46 44 42 40 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2
50 PIN EDGE at the Computer.
| Pin | Name | Direction |
|---|---|---|
| 1 | Sound | 
|
| 2 | Gnd | 
|
| 3 | A15 |
|
| 4 | A14 |
|
| 5 | A13 |
|
| 6 | A12 |
|
| 7 | A11 |
|
| 8 | A10 |
|
| 9 | A9 |
|
| 10 | A8 |
|
| 11 | A7 |
|
| 12 | A6 |
|
| 13 | A5 |
|
| 14 | A4 |
|
| 15 | A3 |
|
| 16 | A2 |
|
| 17 | A1 |
|
| 18 | A0 |
|
| 19 | D7 | 
|
| 20 | D6 |
|
| 21 | D5 |
|
| 22 | D4 |
|
| 23 | D3 |
|
| 24 | D2 |
|
| 25 | D1 |
|
| 26 | D0 |
|
| 27 | +5v |
|
| 28 | /MREQ |
|
| 29 | /M1 |
|
| 30 | /RFSH |
|
| 31 | /IORQ |
|
| 32 | /RD |
|
| 33 | /WR |
|
| 34 | /HALT |
|
| 35 | /INT | 
|
| 36 | /NMI |
|
| 37 | /BUSRQ |
|
| 38 | /BUSAK |
|
| 39 | /WAIT (READY) |
|
| 40 | /BUS RESET |
|
| 41 | /RESET |
|
| 42 | /ROMEN |
|
| 43 | ROMDIS |
|
| 44 | /RAMRD |
|
| 45 | RAMDIS |
|
| 46 | CURSOR |
|
| 47 | L.PEN |
|
| 48 | /EXP | (note 1)
|
| 49 | Gnd |
|
| 50 | f (4Mhz clock) | - |
Note 1: This signal can be re-programmed as a input by using the PPI.
Note 2: Direction is computer relative devices.